First In-Flight Movie?

During an Imperial Airways flight to the Continent in April, 1925, the first in-flight movie, First National's production of Sir Arthur Conan Doyle's The Lost World, was featured. Regular in-flight movies began on July 19, 1961, with the showing of By Love Possessed on a TWA flight between New York and Los Angeles.
(Another account claims: First Inflight Movie - 1921 Aeromarine Airways showed HOWDY CHICAGO to its passengers as the amphibian airplane flew around Chicago).
Well, maybe this is the first movie of an in-flight movie...